NGWS SDK Documentation  

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Compiler Error C2582

'operator =' function is unavailable in 'class'

No assignment (=) operator is defined for the class. If you define any assignment operator that takes the class as a parameter, the compiler cannot generate a default assignment operator for that class.

Assignment operators are not inherited by derived classes. You must explicitly define an assignment operator for each class.

The following sample generates C2582:

class A {
   private:
        A& operator=(const A& a){}
};

class B : public A {
   public:
      // try the following line to resolve the error
      // void operator=(const B& b){}
};

void main() {
   B b1;
   B b2;
   b1 = b2;   // C2582
}

See also

Compiler Errors when Implementing a CObject-Derived Class.